Enhanced Channel Estimation Algorithm for Dedicated Short-Range Communication Systems
Abstract: The Dedicated
Short-Range Communication (DSRC) has been widely accepted as a promising wireless
technology for enhancing traffic safety. In such DSRC-based vehicle-to-vehicle
(V2V) communication systems, because of the extremely time-varying
characteristic of wireless propagation channels, accurate channel estimation is
essential for reliable information exchange between vehicles. In this paper,
the characteristics of the propagation channel and several traditional channel
estimation schemes for V2V communications are reviewed. Then, a delay-based
channel-frequency-response decomposition scheme is proposed to estimate and
predict the double-selective V2V channel while adhering to the IEEE 802.11p standard.
The proposed method achieves a more favorable performance than the traditional
methods in V2V scenarios by combining the least square estimation in the
frequency domain with the linear prediction in time domain. The performance
advantages of the proposed scheme are verified by the simulation results from
three typical scenarios. Furthermore, a reference design on a field-programmable
gate array for the proposed channel estimation scheme is presented for the
purpose of demonstrating its implementation feasibility and complexity.
Keywords: dedicated short
range communications (DSRC), IEEE 802.11p standard, orthogonal frequency
division multiplexing (OFDM), channel estimation
Author: Xiang Li, Fuqiang Liu,
Nguyen Ngoc Van
Journal Code: jptkomputergg150147
